Examine source code of Abstraction in Blue

{
  "name": "Abstraction in  Blue",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "H1.jpg"
    },
    "colors": {
      "frame": "rgba(136, 142, 209, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(134, 139, 209, 0.23)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5a0bfb51-1ec6-403e-97ab-c1b8d57a192d}"
    }
  }
}